SanDisk CompactFlash Card OEM Product Manual ATA Command Description
If the card is in Idle mode, it sets BSY, sets the Sector Count Register to FFh, clears BSY and
generates an interrupt.
Table 5-2 Check Power Mode
Bit 7 6 5 4 3 2 1 0
Command (7) E5H or 98H
C/D/H (6) X Drive X
Cyl High (5) X
Cyl Low (4) X
Sec Num (3) X
Sec Cnt (2) X
Feature (1) X
5.1.2 Execute Drive Diagnostic–90H
This command performs the internal diagnostic tests implemented by the CompactFlash cards.
Table 5-3 Execute Drive Diagnostic
Bit 7 6 5 4 3 2 1 0
Command (7) 90H
C/D/H (6) X Drive X
Cyl High (5) X
Cyl Low (4) X
Sec Num (3) X
Sec Cnt (2) X
Feature (1) X
The Diagnostic codes shown in Table 5-4 are returned in the Error Register at the end of the
command.
Table 5-4 Diagnostic Codes
Code Error Type
01h No error detected
02h Formatter device error
03h Sector buffer error
04h ECC circuitry error
05h Controlling microprocessor error
8Xh Slave failed (True IDE Mode)
© 2007 SanDisk Corporation 5-3 Rev. 12.0, 02/07
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